{"id":4374,"date":"2019-11-23T22:54:47","date_gmt":"2019-11-23T15:54:47","guid":{"rendered":"https:\/\/www.engisv.info\/?p=4374"},"modified":"2023-03-12T00:21:40","modified_gmt":"2023-03-11T17:21:40","slug":"toc-do-truyen-du-lieu-va-thoi-gian-truyen-du-lieu","status":"publish","type":"post","link":"https:\/\/www.engisv.info\/?p=4374","title":{"rendered":"T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 th\u1eddi gian truy\u1ec1n d\u1eef li\u1ec7u."},"content":{"rendered":"<p>B\u1ea1n \u0111i thu\u00ea \u0111\u01b0\u1eddng truy\u1ec1n internet, s\u1eed d\u1ee5ng m\u1ea1ng kh\u00f4ng d\u00e2y (WiFi, 3G, 4G, 5G&#8230;), s\u1eed d\u1ee5ng m\u1ea1ng LAN c\u00f3 d\u00e2y&#8230; cho \u0111\u1ebfn vi\u1ec7c \u0111\u1ecdc ghi d\u1eef li\u1ec7u tr\u00ean c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef (\u1ed5 c\u1ee9ng HDD, SSD, th\u1ebb nh\u1edb&#8230;), t\u1ea5t c\u1ea3 nh\u1eefng th\u1ee9 n\u00e0y \u0111\u1ec1u truy\u1ec1n d\u1eef li\u1ec7u v\u1edbi m\u1ed9t t\u1ed1c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh. V\u1eady t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u l\u00e0 g\u00ec? card m\u1ea1ng 1 Gbit, 100 Mbps l\u00e0 g\u00ec? Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd \u0111i t\u00ecm hi\u1ec3u v\u1ec1 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n<p>Trong b\u00e0i tr\u01b0\u1edbc, ch\u00fang ta \u0111\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 <a href=\"https:\/\/www.engisv.info\/?p=4342\" target=\"_blank\" rel=\"noopener noreferrer\">c\u00e1c \u0111\u01a1n v\u1ecb t\u00ednh dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u<\/a> v\u00e0 bi\u1ebft \u0111\u01b0\u1ee3c c\u00e1ch chuy\u1ec3n \u0111\u1ed5i qua l\u1ea1i gi\u1eefa c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4360 size-full aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Gbit-Gbyte.png\" alt=\"\" width=\"741\" height=\"104\" srcset=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Gbit-Gbyte.png 741w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Gbit-Gbyte-300x42.png 300w\" sizes=\"auto, (max-width: 741px) 100vw, 741px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4358 size-full aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Gbyte-Gbit.png\" alt=\"\" width=\"738\" height=\"106\" srcset=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Gbyte-Gbit.png 738w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Gbyte-Gbit-300x43.png 300w\" sizes=\"auto, (max-width: 738px) 100vw, 738px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4368 size-full aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Bit-vs-byte.png\" alt=\"\" width=\"387\" height=\"104\" srcset=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Bit-vs-byte.png 387w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Bit-vs-byte-300x81.png 300w\" sizes=\"auto, (max-width: 387px) 100vw, 387px\" \/><\/p>\n<p><strong>T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u: <\/strong>L\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian. \u0110\u01a1n v\u1ecb th\u1eddi gian th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 1 gi\u00e2y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-4392 size-full\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/data-speed.png\" alt=\"\" width=\"461\" height=\"146\" srcset=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/data-speed.png 461w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/data-speed-300x95.png 300w\" sizes=\"auto, (max-width: 461px) 100vw, 461px\" \/><\/p>\n<p>Khi b\u1ea1n nghe \u0111\u01b0\u1eddng truy\u1ec1n internet c\u00f3 t\u1ed1c \u0111\u1ed9 30 Mb\/s, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 truy\u1ec1n t\u1ed1i \u0111a 30 megabit d\u1eef li\u1ec7u tr\u00ean 1 gi\u00e2y. Ho\u1eb7c b\u1ea1n nghe card m\u1ea1ng LAN c\u1ee7a m\u00ecnh c\u00f3 t\u1ed1c \u0111\u1ed9 l\u00e0 1 Gb\/s, n\u00f3 c\u00f3 ngh\u0129a l\u00e0 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1i \u0111a c\u1ee7a card m\u1ea1ng l\u00e0 1 gigabit d\u1eef li\u1ec7u tr\u00ean 1 gi\u00e2y.<\/p>\n<p>B\u1ea1n s\u1ebd th\u01b0\u1eddng th\u1ea5y ng\u01b0\u1eddi ta d\u00f9ng bit cho \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1ng, nh\u01b0ng l\u1ea1i d\u00f9ng byte cho c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef cho \u1ed5 c\u1ee9ng. V\u00ed d\u1ee5: b\u1ea1n mua m\u1ed9t \u1ed5 c\u1ee9ng SSD c\u00f3 c\u1ed1c \u0111\u1ed9 \u0111\u1ecdc (Read )545MB\/s v\u00e0 ghi (Write) 430 MB\/s, c\u00f3 ngh\u0129a l\u00e0 t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc d\u1eef li\u1ec7u c\u1ee7a \u1ed5 c\u1ee9ng n\u00e0y l\u00e0 545 megabyte tr\u00ean 1 gi\u00e2y v\u00e0 t\u1ed1c \u0111\u1ed9 ghi d\u1eef li\u1ec7u v\u00e0o \u1ed5 c\u1ee9ng l\u00e0 430 megabyte trong 1 gi\u00e2y.<\/p>\n<p><strong>T\u00ednh to\u00e1n th\u1eddi gian truy\u1ec1n d\u1eef li\u1ec7u:<\/strong><\/p>\n<p>N\u1ebfu b\u1ea1n c\u00f3 1 file d\u1eef li\u1ec7u th\u00ec n\u00f3 s\u1ebd m\u1ea5t bao l\u00e2u \u0111\u1ec3 truy\u1ec1n t\u1ea3i tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n. V\u00ed d\u1ee5; b\u1ea1n c\u00f3 file 40 GB v\u00e0 \u0111\u01b0\u1eddng truy\u1ec1n 100 Mbps :<\/p>\n<ul>\n<li>\u0110\u1ea7u ti\u00ean b\u1ea1n s\u1ebd ti\u1ebfn h\u00e0nh \u0111\u1ed5i dung l\u01b0\u1ee3ng t\u1eeb GB sang Mb. 40GB =327680 Mb.<\/li>\n<li>B\u1ea1n c\u00f3 \u0111\u01b0\u1eddng truy\u1ec1n 100Mb\/s, c\u00f3 ngh\u0129a l\u00e0 trong 1 gi\u00e2y n\u00f3 truy\u1ec1n trong h\u1ebft 100Mb. V\u1eady \u0111\u1ec3 t\u00ednh 40GB d\u1eef li\u1ec7u truy\u1ec1n trong bao nhi\u00eau gi\u00e2y, b\u1ea1n l\u1ea5y (327680 Mb x 1 s)\/100 Mb = 3276.8 s.<\/li>\n<li>Mu\u1ed1n bi\u1ebft h\u1ebft bao nhi\u00eau ph\u00fat, b\u1ea1n ch\u1ec9 c\u1ea7n l\u1ea5y s\u1ed1 gi\u00e2y v\u1eeba t\u00ednh \u0111\u01b0\u1ee3c chia 60. \u1ede \u0111\u00e2y l\u00e0 3276.8 chia cho 60 k\u1ebft qu\u1ea3 l\u00e0 g\u1ea7n 54.6 ph\u00fat<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4386 size-full aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-2.png\" alt=\"\" width=\"466\" height=\"119\" srcset=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-2.png 466w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-2-300x77.png 300w\" sizes=\"auto, (max-width: 466px) 100vw, 466px\" \/><\/p>\n<p>T\u01b0\u01a1ng t\u1ef1 b\u1ea1n c\u00f3 th\u1ec3 t\u00ednh cho MB\/s. V\u1edbi t\u1ed1c \u0111\u1ed9 545 MB\/s c\u1ee7a SSD, b\u1ea1n s\u1ebd t\u1ed1n kho\u1ea3n 1.3 ph\u00fat khi truy\u1ec1n h\u1ebft 40 GB d\u1eef li\u1ec7u.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4928 aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-1.png\" alt=\"\" width=\"675\" height=\"157\" srcset=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-1.png 847w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-1-300x70.png 300w, https:\/\/www.engisv.info\/wp-content\/uploads\/2019\/11\/Data-transmission-time-1-768x179.png 768w\" sizes=\"auto, (max-width: 675px) 100vw, 675px\" \/><\/p>\n<p>V\u1eady t\u1ea1i sao t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u kh\u00f4ng bao gi\u1edd \u0111\u00fang nh\u01b0 con s\u1ed1 m\u00e0 n\u00f3 \u0111\u01b0\u1ee3c ghi. V\u00ed d\u1ee5 b\u1ea1n c\u00f3 card m\u1ea1ng 100Mb\/s nh\u01b0ng kh\u00f4ng bao gi\u1edd truy\u1ec1n \u0111\u01b0\u1ee3c t\u1ed1c \u0111\u1ed9 n\u00e0y. Hay \u0111\u01b0\u1eddng truy\u1ec1n internet 30Mb\/s nh\u01b0ng kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 \u0111\u00f3. \u0110\u01a1n gi\u1ea3n l\u00e0 tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a b\u1ea1n s\u1ebd c\u00f3 r\u1ea5t nhi\u1ec1u traffic kh\u00e1c, ngo\u00e0i vi\u1ec7c ch\u00e9p d\u1eef li\u1ec7u ra. Nh\u1eefng traffic bao g\u1ed3m c\u00e1c th\u00f4ng tin k\u1ebft n\u1ed1i, ki\u1ec3m tra, t\u00ecm \u0111\u01b0\u1eddng&#8230; v\u00e0 c\u00f3 th\u1ec3 b\u1ea1n \u0111ang ch\u1ea1y nhi\u1ec1u t\u00e1c v\u1ee5 song song. N\u00f3 c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o d\u1ecbch v\u1ee5 b\u1ea1n \u0111ang d\u00f9ng l\u00e0 UDP hay TCP&#8230;<\/p>\n<p>Ngo\u00e0i ra, khi k\u1ebft n\u1ed1i internet ch\u00fang ta ph\u1ea3i \u0111i qua r\u1ea5t nhi\u1ec1u c\u00e1c node m\u1ea1ng, \u0111i\u1ec1u n\u00e0y c\u0169ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa 2 \u0111\u00e2u. Tr\u1ea1ng th\u00e1i c\u1ee7a server c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u, khi c\u00f3 qu\u00e1 nhi\u1ec1u k\u1ebft n\u1ed1i server s\u1ebd l\u00e0m cho t\u1ed1c \u0111\u1ed9 k\u1ebft n\u1ed1i c\u1ee7a server gi\u1ea3m xu\u1ed1ng&#8230; c\u00f3 r\u1ea5t nhi\u1ec1u nguy\u00ean nh\u00e2n l\u00e0m cho t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/p>\n<p>T\u01b0\u01a1ng t\u1ef1, \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1ng th\u00ec t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi c\u1ee7a \u1ed5 c\u1ee9ng c\u0169ng nh\u01b0 v\u1eady. T\u1ed1c \u0111\u1ed9 c\u1ee7a truy\u1ec1n d\u1eef li\u1ec7u s\u1ebd l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n \u0111i thu\u00ea \u0111\u01b0\u1eddng truy\u1ec1n internet, s\u1eed d\u1ee5ng m\u1ea1ng kh\u00f4ng d\u00e2y (WiFi, 3G, 4G, 5G&#8230;), s\u1eed d\u1ee5ng m\u1ea1ng LAN c\u00f3 d\u00e2y&#8230; cho \u0111\u1ebfn vi\u1ec7c \u0111\u1ecdc ghi d\u1eef li\u1ec7u tr\u00ean c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef (\u1ed5 c\u1ee9ng HDD, SSD, th\u1ebb nh\u1edb&#8230;), t\u1ea5t c\u1ea3 nh\u1eefng th\u1ee9 n\u00e0y \u0111\u1ec1u truy\u1ec1n d\u1eef li\u1ec7u v\u1edbi m\u1ed9t t\u1ed1c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh. V\u1eady t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u l\u00e0 g\u00ec? card m\u1ea1ng 1 Gbit, 100 Mbps l\u00e0 g\u00ec? Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd \u0111i t\u00ecm hi\u1ec3u v\u1ec1 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u. Trong b\u00e0i tr\u01b0\u1edbc, ch\u00fang&hellip;<\/p>\n","protected":false},"author":2,"featured_media":4344,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"footnotes":""},"categories":[20,7],"tags":[],"class_list":["post-4374","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cac-khai-niem","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 th\u1eddi gian truy\u1ec1n d\u1eef li\u1ec7u. - EngISV<\/title>\n<meta name=\"description\" content=\"B\u1ea1n \u0111i thu\u00ea \u0111\u01b0\u1eddng truy\u1ec1n internet, s\u1eed d\u1ee5ng m\u1ea1ng kh\u00f4ng d\u00e2y (WiFi, 3G, 4G, 5G...), s\u1eed d\u1ee5ng m\u1ea1ng LAN c\u00f3 d\u00e2y... cho \u0111\u1ebfn vi\u1ec7c \u0111\u1ecdc ghi d\u1eef li\u1ec7u tr\u00ean c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef (\u1ed5 c\u1ee9ng HDD, SSD, th\u1ebb nh\u1edb...), t\u1ea5t c\u1ea3 nh\u1eefng th\u1ee9 n\u00e0y \u0111\u1ec1u truy\u1ec1n d\u1eef li\u1ec7u v\u1edbi m\u1ed9t t\u1ed1c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engisv.info\/?p=4374\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 th\u1eddi gian truy\u1ec1n d\u1eef li\u1ec7u. - 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